Answer:
It is advantageous because the fewer variables are presented, the simpler the investigation and the more concrete the hypothesis will be.
A variable is that quantitative data that is modified or varies over time, it must be quantifiable, reasonable, and its variability must be expressed by means of indices, while the control group is the group that is controlled and compared. with other research groups to be able to relate cause-effect or risk factors by exposing them to the agent of the problem, while the researcher observes.
Differentiation is the process by which it is sought to find the differences in the investigation.
The advantages of electronic and optical microscopes is that we can observe very small beings, such as microbiological, or infected tissues, or even tissues to evaluate their histological architecture, they are very important for science and the medical professions, they are adjustable before different cephalometric morphologies, In other words, they can be adapted according to the size of the user to make it more comfortable.
The disadvantages are that the optical microscope cannot see very small microorganisms, such as some viruses and bacteria, and also has much less definition and sharpness than the electronic one, its costs are high, its CORRECT use is difficult to learn and teach, maintenance it is rigorous and delicate.
If the other variables are not controlled, then all the variables would be a possible cause or effect factor of a conclusion, that is, if we do not control the variables, we cannot propose a certain conclusion, effects or hypothesis, since the risk of The error is very high and the conclusions obtained from the uncontrolled variables will have little certainty or credibility.
Step-by-step explanation:
Ls variables in an investigation can be dependent or independent.
It depends on the role they fulfill in the research, they can also be classified as homogeneous or heterogeneous, provided that one raises a main problem, a solution tree, takes into account variables that are selected to be able to face in the research. These investigations must be homogeneous, in order to provide more certainty in the hypothesis or in the conclusion.
That a variable is homogeneous means that it covers most or all the variances of a population, and is the most comprehensive or representative in a logical and reasonable way to what you want to investigate.